Method, device and system for determining coding modulation parameter

ABSTRACT

Disclosed are a method, device and system for determining a coding modulation parameter. The method includes: a terminal receives downlink control information from a base station, and determines a coding modulation parameter according to a domain, within the downlink control information, used for determining the coding modulation parameter.

TECHNICAL FIELD

The disclosure relates, but is not limited, to an Internet of Things(TOT) technology, and in particular to a method, device and system fordetermining a coding modulation parameter.

BACKGROUND

In a wireless communication system, different users use multiplexingaccess technologies to share wireless communication resources. Thecommonly-used multiplexing access technologies include FrequencyDivision Multiplexing Access (FDMA) technology, Time DivisionMultiplexing Access (TDMA) technology, Code Division Multiplexing Access(CDMA) technology, Orthogonal Frequency Division Multiplexing Access(OFDMA) technology, and Single Carrier-Frequency Division MultiplexingAccess (SC-FDMA) technology.

In a Long Term Evolution (LTE) system in Release-12, an uplink and adownlink adopt the SC-FDMA technology and the OFDMA technology,respectively. In a LTE system in Release-13, the study of a NarrowBand-Internet of Things (NB-IOT) technology is started. Uplinktransmission of the NB-IOT technology relates to two multiplexing accesstechnologies, namely the FDMA technology based on Gaussian FilteredMinimum Shift Keying (GMSK) modulation and the SC-FDMA technology. TheFDMA technology based on the GMSK modulation has a characteristic of lowPeak to Average Power Ratio (PAPR), which is beneficial to improving apower amplification efficiency, thereby saving the cost of a UE andensuring the coverage. The FDMA technology based on the GMSK modulationhas an advantage of being insensitive to a timing precision, but has adisadvantage of low spectrum efficiency. The SC-FDMA technology has anadvantage of high spectrum efficiency.

In an LTE-Advanced (LTE-A) system, a SC-FDMA technology is adopted in anuplink, and the OFDMA technology is adopted in a downlink. The LTEsystem and the LTE-A system have become the most popular fourthgeneration mobile communication systems in the world.

A Machine Type Communication (MTC) User Equipment (UE), also calledMachine to Machine (M2M) UE, is the primary form of applications of IOTat present. Several technologies applied to Cellular Internet of Things(C-IOT) are disclosed in the 3rd Generation Partnership Project (3GPP)technical report TR45.820V200, in which a Narrowband LTE (NB-LTE)technology is most significant. A system bandwidth of the NB-LTE systemis 200 kHz, which is as same as a channel bandwidth of the Global systemfor Mobile Communication (GSM) system, thereby bringing greatconvenience to the NB-LTE system to reuse a GSM frequency spectrum anddecrease a mutual interference with a GSM channel. A transmittingbandwidth and a downlink subcarrier interval of the NB-LTE system arerespectively 180 kHz and 15 kHz, which are as same as the bandwidth of aPhysical Resource Block (PRB) and the subcarrier interval of the LTEsystem respectively.

In the LTE system, a base station sends downlink data to a UE through aPhysical Downlink Shared Channel (PDSCH), and the UE sends uplink datato the base station through a Physical Uplink Shared Channel (PUSCH).Control signaling to be transmitted in the uplink has anAcknowledgement/Negative Acknowledgement (ACK/NACK) message, and threeforms of reflecting downlink physical Channel State Information (CSI);here, the three forms are Channel Quality Indicator (CQI), PrecodingMatrix Indicator (PMI), and Rank Indicator (RI). The UE reports the CSIto the base station through a Physical Uplink Control Channel (PUCCH) orthe PUSCH.

The base station schedules the UE according to the CSI. The base stationdetermines a resource size, a frequency domain position, a Modulationand Coding Scheme (MCS), the number of layers of Multiple-InputMultiple-Output (MIMO) spatial multiplexing and a precoding matrix fortransmitting the downlink data, and sends downlink data and DownlinkControl Information (DCI) on NPRB PRBs indicating the frequency domainposition to the UE. The DCI carries I_(MCS) information. A piece ofI_(MCS) information essentially corresponds to a combination of MCSs, sothe UE can obtain the MCS of the downlink data, and decode anddemodulate the PDSCH data according to the determined MCS.

In the LTE system, as a replacement of the Rate Matching (RM) algorithmin 3GPP Release-6, the RM based on a Circular Buffer (CB) provides amethod being capable of simply generating a puncturing pattern with goodperformance. Bits which are selected for transmission can be read outfrom any position of the CB. If the end of the buffer is reached, theremaining part of data can be read from the starting position of the CBuntil all the L bits are read out. Different positions in the CB can bespecified as the starting position for reading a Hybrid Automatic Repeatrequest (HARQ) data package in each transmission. The definition of aRedundancy Version (RV) determines multiple starting positions ofreading the HARQ data package in the CB, so the value of the RVdetermines the specific starting position of reading the HARQ datapackage in the CB in this transmission. In the 3GPP system, an HARQprocess based on CB rate matching defines four circular RVs (RV=0, 1, 2,3). A sub-package with a length of L bits in each HARQ retransmission iscomposed of L bits which are selected clockwise from the startingposition defined by the RV.

However, the LTE/LTE-A system and the NB-IOT system have the followingdifferences: bandwidths, multi-access modes, coding modes and resourceallocation of the NB-IOT system are greatly different from those in theLTE/LTE-A system, for example, single-tone multiple access andmulti-tone multiple access are introduced in the uplink, tail bitingconvolutional codes instead of Turbo codes are used in the downlink, soa method for determining a coding modulation parameter in the LTE systemand the LTE-A system cannot be applied in the NB-IOT system. In therelated technology, there is no method for determining the codingmodulation parameter in the NB-IOT system, which hinders correct codingand decoding. Meanwhile, the fifth generation mobile communicationsystem (5G) has the similar problem. The disclosure is also applied to aNew Radio Access (NR) system of the 5G.

SUMMARY

The following is an overview of the theme elaborated in thisapplication. The overview is not intended to limit the protection scopeof the claims.

In order to solve the above problem, the disclosure provides a method,device and system for determining a coding modulation parameter, whichcan determine the coding modulation parameter of the NB-IOT system.

To this end, the disclosure provides a method for determining a codingmodulation parameter, which includes that:

a User Equipment (UE) receives Downlink Control Information (DCI) from abase station, and determines a coding modulation parameter according toa field for determining the coding modulation parameter, in the DCI.

In an embodiment, the coding modulation parameter may include at leastone of the following: Transmission Block Size (TBS), a Modulation andCoding Scheme (MCS), or predefined transmission information;

the field for determining the coding modulation parameter may include:

a resource allocation field; or

one of an MCS field, a TBS indication field, a joint coding field of theMCS and the predefined transmission information, and a joint codingfield of TBS information and the predefined transmission information; or

a resource allocation field and one of an MCS field, a TBS indicationfield, a joint coding field of the MCS and the predefined transmissioninformation, and a joint coding field of TBS information and thepredefined transmission information;

the resource allocation field is used for providing information aboutResource Unit (RU)-based resource allocation for a Transmission Block(TB); the MCS field is used for indicating the MCS; the TBS indicationfield is used lonely or together with a number of resource elements fordetermining the TBS; the TBS information is used for determining theTBS; and

an RU may include two-dimensional time-frequency resources including Nscconsecutive frequency-domain subcarriers and Nsym consecutivetime-domain Orthogonal Frequency Division Multiplexing (OFDM) symbols;the RU includes Nsc×Nsym resource elements, where the Nsc and the Nsymare integers greater than or equal to 1.

In an embodiment, the predefined transmission information may include atleast one of the following: a number of repetitions (Nrep) or aRedundancy Version (RV); where the RV is an element in a set {0, 1} or aset {0, 1, 2, 3}.

In an embodiment, the operation that the UE determines a codingmodulation parameter according to a field for determining the codingmodulation parameter, in the DCI may include one of the following.

Manner 1:

the UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the MCS field;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the MCS field, or the number of RUsoccupied by the TB, or the MCS field and the number of RUs occupied bythe TB, at least one of the following: the TBS, the Nrep, or the RV.

Manner 2:

the UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the TBS indicationfield;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the TBS indication field, or the numberof RUs occupied by the TB, or the TBS indication field and the number ofRUs occupied by the TB, at least one of the following: the MCS, theNrep, or the RV.

Manner 3:

the UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the joint codingfield of the MCS and the predefined transmission information;

here, the joint coding field of the MCS and the predefined transmissioninformation at least includes the following characteristics:

1) the predefined transmission information includes the RV; RVscorresponding to N1 MCSs are always equal to 0; RVs corresponding to N2MCSs have at least two values; and a number of all the MCSs in the MCSfield is (N1+N2); or,

2) the predefined transmission information includes the Nrep; thesmaller the MCS index, the larger the Nrep corresponding to the MCSindex; the larger the MCS index, the smaller the Nrep corresponding tothe MCS index; or

3) the predefined transmission information includes the RV and the Nrep;the smaller the MCS index, the larger the Nrep corresponding to the MCSindex and the smaller the number of RVs corresponding to the MCS index;the larger the MCS index, the smaller the Nrep corresponding to the MCSindex and the larger the number of RVs corresponding to the MCS index;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the joint coding field of the MCS andthe predefined transmission information, or the number of RUs occupiedby the TB, or the joint coding field of the MCS and the predefinedtransmission information and the number of RUs occupied by the TB, atleast one of the following: the TBS, the Nrep, or the RV.

Manner 4:

the UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the joint codingfield of the TBS information and the predefined transmissioninformation;

here, the joint coding field of the TBS information and the predefinedtransmission information at least includes the followingcharacteristics:

1) the predefined transmission information includes the RV, RVscorresponding to N1 TBSs in the TBS indication field are always equal to0; RVs corresponding to N2 TBSs in the TBS indication field at leasthave two values; and a number of all the TBSs in the TBS indicationfield is (N1+N2); or,

2) the predefined transmission information includes the Nrep; thesmaller the TBS, the larger the Nrep corresponding to the TBS; thelarger the TBS, the smaller the Nrep corresponding to the TBS; or

3) the predefined transmission information includes the RV and the Nrep;the smaller the TBS, the larger the Nrep corresponding to the TBS andthe smaller the number of RVs corresponding to the TBS; the larger theTBS, the smaller the Nrep corresponding to the TBS and the larger thenumber of RVs corresponding to the TBS;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the joint coding field of the TBSindication field and the predefined transmission information, or thenumber of RUs occupied by the TB, or the joint coding field of the TBSindication field and the predefined transmission information and thenumber of RUs occupied by the TB, at least one of the following: theTBS, the Nrep, or the RV;

here, the number of RUs occupied by the TB is a number of RUs occupiedby the TB during a Hybrid Automatic Repeat request (HARQ) transmission,or the number of RUs occupied by the TB is a number of RUs occupied bythe TB before repetition processing of an HARQ transmission.

In an embodiment, the manner 1 may include that:

the UE determines the number of RUs occupied by the TB according to theresource allocation field;

the UE determines a TBS index and at least one of the Nrep or the RV,according to the MCS field; and

the UE determines the TBS according to the TBS index and the number ofRUs occupied by the TB.

In an embodiment, the operation that the UE determines TBS index and atleast one of the Nrep or the RV according to the MCS field may includethat:

the UE searches for the TBS index and at least one of the Nrep or the RVcorresponding to the MCS field, in a first preset mapping relationshipamong an MCS index, the TBS index and at least one of the Nrep or theRV.

In an embodiment, the first preset mapping relationship may be a secondmodulation and TBS index table including a number L1 of combinations ofmodulation schemes and TBS indexes which are in a first modulation andTBS index table; where L1 is an integer which is less than or equal to11, or less than or equal to 8.

In an embodiment, the method further may include that: before searchingin the first preset mapping relationship, the UE determines the secondmodulation and TBS index table according to at least one of thefollowing: link directions, multiple access modes, size of subcarrierinterval, application scenarios, protocol versions, a number oftransmissions, or carrier frequency.

Here, the application scenarios include Enhanced Mobile Broadband (eMBB)of the fifth generation mobile communication system (5G), Ultra Reliableand Low Latency Communication (URLLC) of 5G, and Massive Machine TypeCommunication (mMTC).

In an embodiment, the operation that the UE determines the TBS accordingto the TBS index and the number of RUs occupied by the TB may includethat:

the UE searches for the TBS corresponding to the TBS index and thenumber of RUs occupied by the TB in a second preset mapping relationshipamong the TBS index, the number of RUs occupied by the TB and the TBS.

In an embodiment, the operation that the UE determines the TBS index andat least one of the Nrep or the RV according to the MCS field mayinclude that:

the UE determines joint coding information of the TBS index and thepredefined transmission information according to the MCS field, and

the UE determines, according to the joint coding information of the TBSindex and the predefined transmission information, at least one of thefollowing: the TBS index, the Nrep, or the RV.

In an embodiment, the joint coding information of the TBS index and thepredefined transmission information may include at least one of thefollowing characteristics:

when the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationis the RV, RVs corresponding to N1 TBS indexes are 0, and RVscorresponding to N2 TBS indexes have at least two values;

when the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationis the Nrep, the smaller the TBS index, the larger the Nrepcorresponding to the TBS index; the larger the TBS index, the smallerthe Nrep corresponding to the TBS index; or

when the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationincludes the RV and the Nrep, the smaller the TBS index, the larger theNrep corresponding to the TBS index, and the smaller the number of RVscorresponding to the TBS index; the larger the TBS index, the smallerthe Nrep corresponding to the TBS index, and the larger the number ofRVs corresponding the TBS index.

In an embodiment, when the UE determines that the TBS index is less thanor equal to a preset value, there is one RV supported by the UE; whenthe UE determines that the TBS index is greater than the preset value,there are two or more than two RVs supported by the UE.

In an embodiment, the operation that the UE determines the number of RUsoccupied by the TB according to the resource allocation field mayinclude that:

the UE determines the number of resource elements occupied by the TB, orthe number of time-domain symbols or the number of time-domain OFDMsymbols according to at least one of the following:

search space, DCI format, Cyclic Redundancy Check (CRC) scrambling modecorresponding to the DCI, coverage mode, information about the Nrep inhigh-level configuration signaling, information about the Nrep in abroadcast message, or multiple access mode; and

the UE determines the number of RUs according to the number of resourceelements or the number of time-domain symbols or the number oftime-domain OFDM symbols.

In an embodiment, the RU may include one of the followingcharacteristics:

the number of resource elements included in the RU and the number oftime-domain symbols occupied by the RU, and the number of resourceelements included in the RU and time-domain symbols occupied by the RUare the same in both modes for the UE, comprising a single-tone multipleaccess mode and a multi-tone multiple access mode, and at least one ofthe number of resource elements or the number of time-domain symbols isa fixed value or determined according to a semi-static high-levelconfiguration parameter;

the number of resource elements included in the RU and the number oftime-domain symbols occupied by the RU are different in both modes forthe UE, comprising the single-tone multiple access mode and themulti-tone multiple access mode; and,

the number of resource elements and the number of time-domain symbols ineach of the single-tone multiple access mode and the multi-tone multipleaccess mode are fixed values or determined according to the semi-statichigh-level configuration parameter;

or the number of resource elements or the number of time-domain symbolsin the single-tone multiple access mode is read from a first set, andthe number of resource elements or the number of time-domain symbols inthe multi-tone multiple access mode is read from a second set; where thefirst set is a subset of the second set;

or the number of resource elements in the single-tone multiple accessmode is an integral multiple of the number of resource elements in themulti-tone multiple access mode, or the number of time-domain symbols inthe single-tone multiple access mode is an integral multiple of thenumber of time-domain symbols in the multi-tone multiple access mode;

or the number of resource elements in the multi-tone multiple accessmode is an integral multiple of the number of resource elements in thesingle-tone multiple access mode, or the number of time-domain symbolsin the multi-tone multiple access mode is an integral multiple of thenumber of time-domain symbols in the single-tone multiple access mode;

or the number of resource elements or the number of time-domain symbolsin each of the single-tone multiple access mode and the multi-tonemultiple access mode is a common divisor of X, where the X is a positiveinteger greater than a preset threshold.

In an embodiment, the RU is a time-frequency resource block includingNsc frequency-domain subcarriers and Nsym0 time-domain symbols; wherethe Nsym0 is the number of time-domain symbols, which is a fixed valueor determined according to the semi-static high-level configurationparameter; the Nsc is an integer greater than or equal to 1;

or the RU is a time-frequency resource block including Nscfrequency-domain subcarriers and

$\frac{{Nre}\; 0}{Nsc}$

time-domain symbols, where the Nre0 is the number of resource elements,which is a fixed value or determined according to the semi-statichigh-level configuration parameter.

In an embodiment, the Nsc is a power of 2, or the product of a primenumber less than 10 and a power of 2;

the Nsym0 is the product of a prime number less than 10 and a power of2, or a power of 2.

In an embodiment, the Nrep is the product of the prime number less than10 and the power of 2, or a power of 2.

In an embodiment, the Nsc is an element in a subset of a set {1, 2, 3,4, 6, 8, 12}.

In an embodiment, the Nsc is an element in a subset of a set {1, 2, 3,4, 6, 12};

the number of time-domain symbols in each of the single-tone multipleaddress mode and the multi-tone multiple address mode is 144K1, wherethe K1 is an integer greater than or equal to 1.

In an embodiment, the Nsc is an element in a subset of a set {1, 2, 3,4, 6, 8, 12}, and the subset includes 8;

the number of time-domain symbols in the single-tone multiple addressmode is 144×K2, and the number of time-domain symbols in the multi-tonemultiple address mode is 288×K3, where the K2 and the K3 are integersgreater than or equal to 1.

In an embodiment, the K1 is equal to 1, the K2 is equal to 1, and the K3is equal to 1;

or the K1 is equal to 5, the K2 is equal to 5, and the K3 is equal to 5;

or the K1 is equal to 10, the K2 is equal to 10, and the K3 is equal to10.

In an embodiment, the fixed value of the number of time-domain symbolsin the single-tone multiple address mode or the multi-tone multipleaddress mode is different varies with a coverage level;

or, the number of time-domain symbols in the single-tone multipleaddress mode or the multi-tone multiple address mode is read from thefirst set when the coverage level is less than a preset level, and isread from the second set when the coverage level is greater than orequal to the preset level.

In an embodiment, the number of RUs is one of the following:

the product of a prime number less than 10 and a power of 2, the powerof 2, and a natural number from 1 to Nmax, where the Nmax is an integergreater than or equal to 1.

In an embodiment, the resource allocation field includes at least one ofthe following:

information about the frequency-domain subcarriers allocated to the TB,information about the number of RUs included in the TB, or informationabout the time-domain symbols allocated to the TB.

The disclosure also provides a method for determining a codingmodulation parameter, which comprises:

a base station sends Downlink Control Information (DCI) to a UserEquipment (UE); the DCI includes a field for determining a codingmodulation parameter.

In an embodiment, the field for determining the coding modulationparameter may include:

a resource allocation field; or

one of an Modulation and Coding Scheme (MCS) field, a Transmission BlockSize (TBS) indication field, a joint coding field of MCS and predefinedtransmission information, and a joint coding field of TBS informationand predefined transmission information; or

a resource allocation field and one of an Modulation and Coding Scheme(MCS) field, a Transmission Block Size (TBS) indication field, a jointcoding field of MCS and predefined transmission information, and a jointcoding field of TBS information and predefined transmission information.

Here, the resource allocation field is used for providing informationabout Resource Unit (RU)-based resource allocation for a TransmissionBlock (TB); the MCS field is used for indicating the MCS; the TBSindication field is used lonely or together with a number of resourceelements for determining the TBS; the TBS information is used fordetermining the TBS.

An RU includes two-dimensional time-frequency resources including Nscconsecutive frequency-domain subcarriers and Nsym consecutivetime-domain Orthogonal Frequency Division Multiplexing (OFDM) symbols;the RU includes Nsc×Nsym resource elements, where the Nsc and the Nsymare integers greater than or equal to 1.

In an embodiment, the predefined transmission information includes atleast one of the following: a number of repetitions (Nrep) or aRedundancy Version (RV); where the RV is an element in a set {0, 1} or aset {0, 1, 2, 3}.

The disclosure also provides a User Equipment (UE), which includes that:

a receiving module, configured to receive Downlink Control Information(DCI) from a base station; and

a determining module, configured to determine a coding modulationparameter according to a field for determining the coding modulationparameter, in the DCI.

In an embodiment, the determining module is further configured todetermine the coding modulation parameter using one of the followingmanners.

Manner 1:

determining that the field for determining the coding modulationparameter includes a resource allocation field and a Modulation andCoding Scheme (MCS) field;

determining a number of Resource Units (RUs) occupied by a TransmissionBlock (TB) according to the resource allocation field; and

determining, according to the MCS field, or the number of RUs occupiedby the TB, or the MCS field and the number of RUs occupied by the TB, atleast one of the following: Transmission Block Size (TBS), a number ofrepetitions (Nrep), or a Redundancy Version (RV).

Manner 2:

determining that the field for determining the coding modulationparameter includes a resource allocation field and a TBS indicationfield;

determining a number of RUs occupied by a TB according to the resourceallocation field; and

determining, according to the TBS indication field, or the number of RUsoccupied by the TB, or the TBS indication field and the number of RUsoccupied by the TB, at least one of the following: an MCS, an Nrep, oran RV.

Manner 3:

determining that the field for determining the coding modulationparameter includes a resource allocation field and a joint coding fieldof an MCS and predefined transmission information;

the joint coding field of the MCS and the predefined transmissioninformation at least includes that:

the predefined transmission information includes an RV; RVscorresponding to N1 MCSs are always equal to 0; RVs corresponding to N2MCSs have at least two values; and a number of all the MCSs in an MCSfield is (N1+N2); or,

the predefined transmission information includes an Nrep; the smallerthe MCS index, the larger the Nrep corresponding to the MCS index; thelarger the MCS index, the smaller the Nrep corresponding to the MCSindex; or

the predefined transmission information includes the RV and the Nrep;the smaller the MCS index, the larger the Nrep corresponding to the MCSindex and the smaller a number of RVs corresponding to the MCS index;the larger the MCS index, the smaller the Nrep corresponding to the MCSindex and the larger the number of RVs corresponding to the MCS index;

determining a number of RUs occupied by a TB according to the resourceallocation field; and

determining, according to the joint coding field of the MCS and thepredefined transmission information, or the number of RUs occupied bythe TB, or the joint coding field of the MCS and the predefinedtransmission information and the number of RUs occupied by the TB, atleast one of the following: a TBS, the Nrep, or the RV.

Manner 4:

determining that the field for determining the coding modulationparameter includes a resource allocation field and a joint coding fieldof TBS information and predefined transmission information;

the joint coding field of the TBS information and the predefinedtransmission information at least includes that:

the predefined transmission information includes an RV, RVscorresponding to N1 TBSs in the TBS indication field are always equal to0; RVs corresponding to N2 TBSs in the TBS indication field at leasthave two values; and a number of all the TBSs in the TBS indicationfield is (N1+N2); or,

the predefined transmission information includes an Nrep; the smallerthe TBS, the larger the Nrep corresponding to the TBS; the larger theTBS, the smaller the Nrep corresponding to the TBS; or

the predefined transmission information includes an RV and an Nrep; thesmaller the TBS, the larger the Nrep corresponding to the TBS and thesmaller the number of RVs corresponding to the TBS; the larger the TBS,the smaller the Nrep corresponding to the TBS and the larger the numberof RVs corresponding to the TBS;

determining a number of RUs occupied by a TB according to the resourceallocation field; and

determining, according to the joint coding field of the TBS indicationfield and the predefined transmission information, or the number of RUsoccupied by the TB, or the joint coding field of the TBS indicationfield and the predefined transmission information and the number of RUsoccupied by the TB, at least one of the following: the TBS, the Nrep, orthe RV;

the number of RUs occupied by the TB is a number of RUs occupied by theTB during a Hybrid Automatic Repeat request (HARQ) transmission, or thenumber of RUs occupied by the TB is a number of RUs occupied by the TBbefore repetition processing of an HARQ transmission.

In an embodiment, the determining module is further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

determine an TBS index and at least one of an Nrep or an RV according toan MCS field; and

determine a TBS according to the TBS index and the number of RUsoccupied by the TB.

In an embodiment, the determining module is further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

search for a TBS index and at least one of an Nrep or an RVcorresponding to an MCS field in a first preset mapping relationshipamong an MCS index, a TBS index and at least one of the Nrep or the RV;and

determine a TBS according to the TBS index and the number of RUsoccupied by the TB.

In an embodiment, the determining module is further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

determine at least one of the following according to an MCS field: a TBSindex, an Nrep, or an RV; and

search for a TBS corresponding to the TBS index and the number of RUs ina second preset mapping relationship among the TBS index, the number ofRUs and the TBS.

In an embodiment, the determining module is further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

determine a joint coding information of a TBS index and predefinedtransmission information according to an MCS field;

determine according to the joint coding information of the TBS index andthe predefined transmission information at least one of the following:the TBS index, an Nrep, or an RV; and

determine a TBS according to the TBS index and the number of RUsoccupied by the TB.

In an embodiment, the determining module is further configured to:

determine a number of resource elements occupied by a TB or a number oftime-domain symbols or a number of time-domain OFDM symbols according toat least one of the following: search space, DCI format, CyclicRedundancy Check (CRC) scrambling mode corresponding to the DCI,coverage mode, information about the Nrep in high-level configurationsignaling, information about the Nrep in a broadcast message, ormultiple access mode; and

determine the number of RUs according to the number of resource elementsor the number of time-domain symbols or the number of time-domain OFDMsymbols.

The disclosure also provides a base station, which includes that:

a sending module, configured to send Downlink Control Information (DCI)to a User Equipment (UE), the DCI includes a field for determining acoding modulation parameter.

The disclosure also provides a system for determining a codingmodulation parameter, which includes that: any of the base stationdescribed above and any of the UE described above.

Further, the disclosure also provides a computer readable storagemedium, in which computer executable instructions are stored; thecomputer executable instructions are used for performing a method fordetermining a coding modulation parameter according to any one ofembodiments above.

Compared with the related technology, the technical solutions of thedisclosure include that: the UE receives DCI from the base station andthe UE determines the coding modulation parameter according to the fieldfor determining the coding modulation parameter in the DCI. Through thetechnical solutions, the coding modulation parameter is determinedaccording to the field for determining the coding modulation parameterin the DCI, so that the determining of the coding modulation parameterof the NB-IOT system is implemented.

In an embodiment, under the condition of maintaining compatibility, themethod of joint coding improves the performance of retransmission orrepetition while reducing signaling overhead as much as possible.

Other characteristics and advantages of the disclosure will beelaborated in the following specification, and partly become apparent inthe specification or understood by implementing the disclosure. Theobjectives and other advantages of the disclosure can be achieved andobtained by means of the structures specified in the specification, theclaims and the accompanying drawings.

Other aspects can be understood after the accompanying drawings anddetailed descriptions are read and understood.

BRIEF DESCRIPTION OF DRAWINGS

The accompanying drawings described herein are intended to provide afurther understanding of the disclosure, and constitute a part of theapplication. Schematic embodiments of the disclosure and descriptionthereof are used to explain the disclosure, and do not mean toimproperly limit to the disclosure. In the accompanying drawings:

FIG. 1 is a flowchart of a method for determining a coding modulationparameter according to the disclosure;

FIG. 2 is a structure diagram of a UE according to the disclosure; and

FIG. 3 is a structure diagram of a system for determining a codingmodulation parameter according to the disclosure.

DETAILED DESCRIPTION

Herein, the disclosure will be described in detail with reference to theaccompanying drawings and in conjunction with embodiments. It is to benoted that the embodiments and the features in the embodiments of theapplication can be combined with each other without conflict.

It is to be noted that the terms like “first”, “second” and the like inthe specification, the claims and the accompanying drawings of thedisclosure are used for differentiating similar objects and do notnecessarily describe a specific order or a sequence.

Referring to FIG. 1, the disclosure provides a method for determining acoding modulation parameter, which includes the following operations.

At S100, a base station sends Downlink Control Information (DCI) to aUser Equipment (UE).

In this operation, the DCI includes a field for determining the codingmodulation parameter.

Herein, the coding modulation parameter may include at least one of thefollowing: Transmission Block Size (TBS), a Modulation and Coding Scheme(MCS), or predefined transmission information.

The field for determining the coding modulation parameter may include:

a resource allocation field; or

one of an MCS field, a TBS indication field, a joint coding field of theMCS and the predefined transmission information, and a joint codingfield of TBS information and the predefined transmission information; or

a resource allocation field and one of an MCS field, a TBS indicationfield, a joint coding field of the MCS and the predefined transmissioninformation, and a joint coding field of TBS information and thepredefined transmission information.

Herein, the predefined transmission information includes at least one ofthe following: a number of repetitions (Nrep) or a Redundancy Version(RV).

Herein, the Nrep is an integer greater than or equal to 1, and the RV isan element in a set {0, 1} or a set {0, 1, 2, 3}.

Herein, the number of repetitions (Nrep) is the product of a primenumber less than 10 and a power of 2, or a power of 2.

Herein, the resource allocation field is used for providing informationabout Resource Unit (RU)-based resource allocation for a TransmissionBlock (TB).

Herein, the resource allocation field comprises at least one of thefollowing:

information about the frequency-domain subcarriers allocated to the TB,information about the number of RUs comprised in the TB, or informationabout the time-domain symbols allocated to the TB.

Herein, an RU may include two-dimensional time-frequency resourcesincluding Nsc consecutive frequency-domain subcarriers and Nsymconsecutive time-domain Orthogonal Frequency Division Multiplexing(OFDM) symbols; each RU includes Nsc×Nsym resource elements, where theNsc and the Nsym are integers greater than or equal to 1.

The RU may include one of the following characteristics:

the number of resource elements included in the RU and the number oftime-domain symbols occupied by the RU, and the number of resourceelements included in the RU and time-domain symbols occupied by the RUare the same in both modes for the UE, such as, a single-tone multipleaccess mode and a multi-tone multiple access mode, and at least one ofthe number of resource elements or the number of time-domain symbols isa fixed value or determined according to a semi-static high-levelconfiguration parameter;

the number of resource elements included in the RU and the number oftime-domain symbols occupied by the RU are different in both modes forthe UE, such as, the single-tone multiple access mode and the multi-tonemultiple access mode; and,

the number of resource elements and the number of time-domain symbols ineach of the single-tone multiple access mode and the multi-tone multipleaccess mode are fixed values or determined according to the semi-statichigh-level configuration parameter;

or the number of resource elements or the number of time-domain symbolsin the single-tone multiple access mode is read from a first set, andthe number of resource elements or the number of time-domain symbols inthe multi-tone multiple access mode is read from a second set; where thefirst set is a subset of the second set;

or the number of resource elements in the single-tone multiple accessmode is an integral multiple of the number of resource elements in themulti-tone multiple access mode, or the number of time-domain symbols inthe single-tone multiple access mode is an integral multiple of thenumber of time-domain symbols in the multi-tone multiple access mode;

or the number of resource elements in the multi-tone multiple accessmode is an integral multiple of the number of resource elements in thesingle-tone multiple access mode, or the number of time-domain symbolsin the multi-tone multiple access mode is an integral multiple of thenumber of time-domain symbols in the single-tone multiple access mode;

or the number of resource elements or the number of time-domain symbolsin each of the single-tone multiple access mode and the multi-tonemultiple access mode is a common divisor of X, where the X is a positiveinteger greater than a preset threshold.

Herein, the RU is a time-frequency resource block including Nscfrequency-domain subcarriers and Nsym0 time-domain symbols; where theNsym0 is the number of time-domain symbols, which is a fixed value ordetermined according to the semi-static high-level configurationparameter; the Nsc is an integer greater than or equal to 1;

or the RU is a time-frequency resource block including Nscfrequency-domain subcarriers and

$\frac{{Nre}\; 0}{Nsc}$

time-domain symbols; where the Nre0 is the number of resource elements,which is a fixed value or determined according to the semi-statichigh-level configuration parameter.

Herein, the Nsc is a power of 2, or the product of a prime number lessthan 10 and a power of 2. The Nsym0 is the product of a prime numberless than 10 and a power of 2, or a power of 2.

Herein, the Nsc is an element in a subset of a set {1, 2, 3, 4, 6, 8,12}.

Herein, the Nsc is an element in a subset of a set {1, 2, 3, 4, 6, 12};

the number of time-domain symbols in each of the single-tone multipleaddress mode and the multi-tone multiple address mode is 144K1, wherethe K1 is an integer greater than or equal to 1.

Or, Nsc is an element in a subset of a set {1, 2, 3, 4, 6, 8, 12}, andthe subset comprises 8;

the number of time-domain symbols in the single-tone multiple addressmode is 144×K2, and the number of time-domain symbols in the multi-tonemultiple address mode is 288×K3, where the K2 and the K3 are integersgreater than or equal to 1.

Herein, the K1 is equal to 1, the K2 is equal to 1, and the K3 is equalto 1;

or the K1 is equal to 5, the K2 is equal to 5, and the K3 is equal to 5;

or the K1 is equal to 10, the K2 is equal to 10, and the K3 is equal to10.

Herein, the fixed value of the number of time-domain symbols in thesingle-tone multiple address mode or the multi-tone multiple addressmode is different varies with a coverage level;

or, the number of time-domain symbols in the single-tone multipleaddress mode or the multi-tone multiple address mode is read from thefirst set when the coverage level is less than a preset level, and isread from the second set when the coverage level is greater than orequal to the preset level.

Herein, the MCS field is used for indicating the MCS.

Herein, the TBS indication field is used lonely or together with anumber of resource elements for determining the TBS.

Herein, the TBS information is used for determining the TBS.

Herein, the joint coding field of the MCS and the predefinedtransmission information is using an index to indicate the MCS and thepredefined transmission information; the joint coding field of the TBSinformation and the predefined transmission information is using anindex to indicate the TBS information and the predefined transmissioninformation.

Herein, when the predefined transmission information in the joint codingfield of the MCS and the predefined transmission information or thejoint coding field of the TBS information and the predefinedtransmission information is the RV, RVs corresponding to N1 MCSs areequal to 0, and the RVs corresponding to N2 MCSs may be the same ordifferent.

When the predefined transmission information in the joint coding fieldof the MCS and the predefined transmission information or the jointcoding field of the TBS information and the predefined transmissioninformation is the Nrep, the smaller the TBS, the larger the Nrepcorresponding to the TBS; the larger the TBS, the smaller the Nrepcorresponding to the TBS.

When the predefined transmission information in the joint coding fieldof the MCS and the predefined transmission information or the jointcoding field of the TBS information and the predefined transmissioninformation comprises the RV and the Nrep, the smaller the MCS index orthe TBS information, the larger the Nrep corresponding to the MCS indexor the TBS information, and the smaller the number of RVs correspondingto the MCS index or the TBS information; the larger the MCS index or theTBS information, the smaller the Nrep corresponding to the MCS index orthe TBS information, and the larger the number of RVs corresponding tothe MCS index or the TBS information.

At S101, the UE receives the DCI from the base station, and the UEdetermines the coding modulation parameter according to the field fordetermining the coding modulation parameter in the DCI.

Herein, the operation that the UE determines the coding modulationparameter according to the field for determining the coding modulationparameter in the DCI comprises one of the following:

Manner 1:

The UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the MCS field;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the MCS field, or the number of RUsoccupied by the TB, or the MCS field and the number of RUs occupied bythe TB, at least one of the following: the TBS, the Nrep, or the RV.

Manner 2:

The UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the TBS indicationfield;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the TBS indication field, or the numberof RUs occupied by the TB, or the TBS indication field and the number ofRUs occupied by the TB, at least one of the following: the MCS, theNrep, or the RV.

Manner 3:

The UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the joint codingfield of the MCS and the predefined transmission information.

Herein, the joint coding field of the MCS and the predefinedtransmission information at least includes the followingcharacteristics:

1) the predefined transmission information includes the RV; RVscorresponding to N1 MCSs are always equal to 0; RVs corresponding to N2MCSs have at least two values; and a number of all the MCSs in the MCSfield is (N1+N2); or,

2) the predefined transmission information includes the Nrep; thesmaller the MCS index, the larger the Nrep corresponding to the MCSindex; the larger the MCS index, the smaller the Nrep corresponding tothe MCS index; or

3) the predefined transmission information includes the RV and the Nrep;the smaller the MCS index, the larger the Nrep corresponding to the MCSindex and the smaller the number of RVs corresponding to the MCS index;the larger the MCS index, the smaller the Nrep corresponding to the MCSindex and the larger the number of RVs corresponding to the MCS index;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the joint coding field of the MCS andthe predefined transmission information, or the number of RUs occupiedby the TB, or the joint coding field of the MCS and the predefinedtransmission information and the number of RUs occupied by the TB, atleast one of the following: the TBS, the Nrep, or the RV.

Manner 4:

The UE determines that the field for determining the coding modulationparameter includes the resource allocation field and the joint codingfield of the TBS information and the predefined transmissioninformation.

Herein, the joint coding field of the TBS information and the predefinedtransmission information at least includes the followingcharacteristics:

1) the predefined transmission information includes the RV, RVscorresponding to N1 TBSs in the TBS indication field are always equal to0; RVs corresponding to N2 TBSs in the TBS indication field at leasthave two values; and a number of all the TBSs in the TBS indicationfield is (N1+N2); or,

2) the predefined transmission information includes the Nrep; thesmaller the TBS, the larger the Nrep corresponding to the TBS; thelarger the TBS, the smaller the Nrep corresponding to the TBS; or

3) the predefined transmission information includes the RV and the Nrep;the smaller the TBS, the larger the Nrep corresponding to the TBS andthe smaller the number of RVs corresponding to the TBS; the larger theTBS, the smaller the Nrep corresponding to the TBS and the larger thenumber of RVs corresponding to the TBS;

the UE determines a number of RUs occupied by the TB according to theresource allocation field; and

the UE determines, according to the joint coding field of the TBSindication field and the predefined transmission information, or thenumber of RUs occupied by the TB, or the joint coding field of the TBSindication field and the predefined transmission information and thenumber of RUs occupied by the TB, at least one of the following: theTBS, the Nrep, or the RV.

Here, the number of RUs occupied by the TB is a number of RUs occupiedby the TB during a Hybrid Automatic Repeat request (HARQ) transmission,or the number of RUs occupied by the TB is a number of RUs occupied bythe TB before repetition processing of an HARQ transmission.

Here, the number of RUs occupied by the TB (Nru) is a number of RUsoccupied by the TB during a Hybrid Automatic Repeat request (HARQ)transmission, or the number of RUs occupied by the TB is a number of RUsoccupied by the TB before repetition processing of an HARQ transmission.

Herein, an illustration is given below by taking the manner 1 forexample, and the implementations of other manners are similar. Thoseskilled in the art may obtain the implementations of other mannersaccording to the implementation of the manner 1 by analogy, and theimplementations fall within the protection scope of the disclosure.

Herein, the manner 1 may include that:

the UE determines the number of RUs occupied by the TB according to theresource allocation field; and the UE determines a TBS index and atleast one of the Nrep or the RV, according to the MCS field; and the UEdetermines the TBS according to the TBS index and the number of RUsoccupied by the TB.

Herein, the operation that the UE determines the number of RUs occupiedby the TB according to the resource allocation field may include that:

the UE determines that the number of resource elements occupied by theTB, and/or the number of time-domain symbols or the number oftime-domain OFDM symbols according to at least one of the following:search space, DCI format, Cyclic Redundancy Check (CRC) scrambling modecorresponding to the DCI, coverage mode, information about the Nrep inhigh-level configuration signaling, information about the Nrep in abroadcast message, or multiple access mode; and

the UE determines the number of RUs according to the number of resourceelements and/or the number of time-domain symbols or the number oftime-domain OFDM symbols.

Herein, the number of RUs is one of the following:

the product of a prime number less than 10 and a power of 2, the powerof 2, and a natural number from 1 to Nmax, where the Nmax is an integergreater than or equal to 1.

Herein, the operation that the UE determines, according to the MCSfield, or the number of RUs occupied by the TB, or the MCS field and thenumber of RUs occupied by the TB, at least one of the following: theTBS, the Nrep, or the RV, may include that:

the UE determines, according to the MCS field, the TBS index and atleast one of the Nrep or the RV; and the UE determines the TBS accordingto the TBS index and the number of RUs occupied by the TB.

Or, the UE determines joint coding information of the TBS index and thepredefined transmission information according to the MCS field, anddetermines, according to the joint coding information of the TBS indexand the predefined transmission information, at least one of thefollowing: the TBS index, the Nrep, or the RV; and the UE determines theTBS according to the TBS index and the number of RUs occupied by the TB.

Herein, the UE determines the TBS index and at least one of the Nrep orthe RV according to the MCS field may include that:

the UE searches for at least one of an Nrep or an RV corresponding tothe MCS field in a first preset mapping relationship among an MCS index,a TBS index and at least one of the Nrep or the RV.

Herein, the first preset mapping relationship is a second modulation andTBS index table including a number L1 of combinations of modulationschemes and TBS indexes which are in a first modulation and TBS indextable. The first corresponding relationship is a table search function,indicating a mapping relationship between table indexes and tablecontents.

Herein, L1 is an integer which is less than or equal to 11, or less thanor equal to 8.

Herein, the first modulation and TBS index table is a 5-bit modulationand TBS index table in Release 8 of the LTE system.

Herein, all of the RVs in the number L1 of the combinations ofmodulation scheme and TBS index are 0, and all of the RVs in the numberL2 of the combinations of modulation scheme and TBS index are not 0.

Herein, before searching in the first preset mapping relationship, theUE determines the second modulation and TBS index table according to atleast one of the following: link directions, multiple access modes, sizeof subcarrier interval, application scenarios, protocol versions, anumber of transmissions, or carrier frequency.

Here, the application scenarios include Enhanced Mobile Broadband (eMBB)of the fifth generation mobile communication system (5G), Ultra Reliableand Low Latency Communication (URLLC) of 5G, and Massive Machine TypeCommunication (mMTC).

Herein, the link directions include uplink and downlink; the multipleaccess modes include a single-tone multiple access mode or a multi-tonemultiple access mode.

Herein, the joint coding information of the TBS index and the predefinedtransmission information is using an index to indicate the TBS index andthe predefined transmission information.

When the predefined transmission information in the joint coding fieldof the TBS index and the predefined transmission information is the RV,RVs corresponding to a number N1 of TBS indexes are 0, and RVscorresponding to a number N2 of TBS indexes have the same value ordifferent values.

When the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationis the Nrep, the smaller the TBS index, the larger the Nrepcorresponding to the TBS index; the larger the TBS index, the smallerthe Nrep corresponding to the TBS index.

When the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationcomprises the RV and the Nrep, the smaller the TBS index, the larger theNrep corresponding to the TBS index, and the smaller the number of RVscorresponding to the TBS index; the larger the TBS index, the smallerthe Nrep corresponding to the TBS index, and the larger the number ofRVs corresponding the TBS index.

Herein, when the UE determines that the TBS index is less than or equalto a preset value, there is one RV supported by the UE; when the UEdetermines that the TBS index is greater than the preset value, thereare two or more than two RVs supported by the UE.

Herein, the operation that the UE determines the TBS according to theTBS index and the number of RUs occupied by the TB may include that:

the UE searches for a TBS corresponding to the TBS index and the numberof RUs in a second preset mapping relationship among the TBS index, thenumber of RUs and the TBS.

The embodiments of the disclosure also provides a computer readablestorage medium, in which computer executable instructions are stored;the computer executable instructions are used for performing a methodfor determining a coding modulation parameter according to any one ofembodiments above.

The method of the disclosure is elaborated below through specificembodiments.

First Embodiment

The UE receives the DCI sent by the base station, and determines,according to the resource allocation field and the MCS field I_(MCS) inthe DCI, at least one of the following: a TBS, an Nrep, or an RV.

Herein, the DCI includes the MCS field I_(MCS) and the resourceallocation field.

Herein, the resource allocation field is used for providing informationabout Resource Unit (RU)-based resource allocation for a TransmissionBlock (TB); the MCS field is used for indicating the MCS.

Herein, an RU comprises two-dimensional time-frequency resourcescomprising Nsc consecutive frequency-domain subcarriers and Nsymconsecutive time-domain Orthogonal Frequency Division Multiplexing(OFDM) symbols; the RU comprises Nsc×Nsym resource elements, where theNsc and the Nsym are integers greater than or equal to 1.

Herein, the operation that the UE determines, according to the resourceallocation field and the MCS field I_(MCS) in the DCI, at least one ofthe TBS, the Nrep or the RV may include that:

the UE determines the number of RUs (Nru) occupied by a TB according tothe resource allocation field; and

the UE determines, according to the MCS field I_(MCS), or the number ofRUs Nru occupied by the TB, or the MCS field I_(MCS) and the number ofRUs (Nru) occupied by the TB, at least one of the following: the TBS,the Nrep, or the RV.

Herein, the Nru is the number of RUs occupied by one TB during an HARQtransmission, or the number of RUs occupied by one TB before repetitionprocessing of an HARQ transmission.

Herein, the operation that the UE determines, according to the MCS fieldI_(MCS), or the number of RUs occupied by the TB, or the MCS fieldI_(MCS) and the number of RUs occupied by the TB, at least one of theTBS, the Nrep or the RV may include that:

the UE determines, according to the MCS field I_(MCS), at least one ofthe following: the TBS, the Nrep, or the RV, and determines the TBSaccording to the TBS index and the Nru;

or, the UE determines, according to the MCS field I_(MCS), the jointcoding information of the TBS index and the predefined transmissioninformation, and determines at least one of the TBS index, the Nrep, orthe RV according to the joint coding information of the TBS index andthe predefined transmission information.

Herein, the joint coding information of the TBS index and the predefinedtransmission information includes at least one of the followingcharacteristics:

when the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationis the RV, RVs corresponding to N1 TBS indexes are 0, and RVscorresponding to N2 TBS indexes have the same value or different values;

when the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationis the Nrep, the smaller the TBS index, the larger the Nrepcorresponding to the TBS index; the larger the TBS index, the smallerthe Nrep corresponding to the TBS index; or

when the predefined transmission information in the joint codinginformation of the TBS index and the predefined transmission informationcomprises the RV and the Nrep, the smaller the TBS index, the larger theNrep corresponding to the TBS index, and the smaller the number of RVscorresponding to the TBS index; the larger the TBS index, the smallerthe Nrep corresponding to the TBS index, and the larger the number ofRVs corresponding the TBS index.

Herein, the MCS field only indicates one TBS index and one RV; or, whenthe TBS index indicated by the MCS field is less than or equal to thepreset value, one TBS index corresponds to only one RV; when the TBSindex indicated by the MCS field is greater than the preset value, oneTBS index corresponds to at least two RVs.

Particularly, when the TBS index is less than or equal to 3, because acoding rate is lower than or equal to 1/3 coding rate, it is only neededto support version 0; when the TBS index is greater than 3, because thecoding rate is higher than 1/3 coding rate, it is needed to support atleast two versions.

In an example below, the RV to be supported is extended withoutincreasing I_(MCS) overheads.

TABLE 1 The second modulation and TBS index table MCS index ImcsModulation order Qm TBS index Ims RV 0(0) 2 0 0 1(1) 2 1 0 2(2) 2 2 03(3) 2 3 0 4(4) 2 4 0 5(5) 2 5 0 6(6) 2 6 0 7(7) 2 7 0 8(8) 2 8 0 9(9) 29 0 10(4) 2 4 2 11(5) 2 5 2 12(6) 2 6 2 13(7) 2 7 2 14(8) 2 8 2 15(9) 29 2

Herein, based on the second modulation and the TBS index table, the UEdetermines the TBS index according to the MCS field; the firstmodulation and the TBS index table is the 5-bit modulation and the TBSindex table in Release-8 of the LTE system.

The second modulation and the TBS index table has the followingcharacteristic: the MCS index in the second modulation and the TBS indextable has 16 values, that is, the MCS index is indicated by 4 bits. Thenumber L1 of combinations of modulation modes and TBS indexes, except anumber L2 of combinations of modulation mode and TBS index, in the firstmodulation and TBS index table serve as the number L1 of combinations ofmodulation mode and TBS index in the second modulation and the TBS indextable in order, and RVs corresponding to these combinations are 0. RVscorresponding to the number L2 of the combinations except the number L1of the combinations in the second modulation and the TBS index table arenot 0; here, the L1 is equal to 10, and the L2 is equal to 6.

Compared with the related technology, the second modulation and TBSindex table may support 10 MCS orders, 4 bits are needed to indicate theMCS field in the DCI, and 1 bit or 2 bits are needed to indicate the RV.In the disclosure, the table essentially may support 10 MCS orders, 4bits are needed to indicate the MCS field in the DCI, and an independentsignaling for indicating the RV is not needed. In the disclosure, the 6default states are used to bear information of different RVs, so thereare 6 MCS orders which may support the RV0 or the RV2; the rates ofthese six MCS orders are usually higher than 1/3 coding rate, and adecoder may obtain a gain of combined Incremental Redundancies (IR)during repeated transmission or HARQ transmission. The rates of the rest4 MCSs are usually lower than 1/3 coding rate, the support of multipleRVs cannot improve the performance notably. So, according to thetechnical solutions of the disclosure, the signaling overhead of 1 bitto 2 bits for indicating the RV can be saved, this is crucial for anNB-IOT UE. Further, according to the disclosure, a MCS can support atleast two RVs, thereby dramatically improving the performance ofrepeated transmission and HARQ transmission.

The UE determines the TBS according to the TBS index and the number ofRUs (Nru) occupied by one TB. Particularly, the UE may determine the TBSbased on a table below.

TABLE 2 A mapping relationship among the TBS index, the number of RUsand the TBS N_(ru) I_(TBS) 1 2 3 4 5 6 7 0 16 32 56 88 120 152 176 1 2456 88 144 176 208 224 2 32 72 144 176 208 256 296 3 40 104 176 208 256328 392 4 56 120 208 256 328 408 488 5 72 144 224 328 424 504 600 6 328176 256 392 504 600 712 7 104 224 328 472 584 712 840 8 120 256 392 536680 808 968 9 136 296 456 616 776 936

Second Embodiment

The UE receives the DCI sent by the base station, and determines,according to the TBS indication field and the resource allocation field,at least one of the following: the MCS, the Nrep, or the RV.

Herein, the operation that the UE determines at least one of the MCS,the Nrep, or the RV according to the TBS indication field and theresource allocation field includes that:

the UE determines the number of RUs occupied by one TB according to theresource allocation field; and the UE determines, according to the TBSindication field and the Nru, at least one of the following: the MCS,the Nrep, or the RV.

Herein, the Nru is the number of RUs occupied by one TB during an HARQtransmission, or the number of RUs occupied by one TB before repetitionprocessing of an HARQ transmission.

Herein, the operation that the UE determines at least one of the MCS,the Nrep or the RV according to the TBS indication field and the Nruincludes that:

the UE searches for the TBS of the current TB in a one-dimensional tableaccording to the TBS index; and

the UE searches for at least one of the MCS, the Nrep, or the RV in atwo-dimensional table according to the number of RUs occupied by one TBand the TBS index.

The advantages of the embodiment are that: when the number of TBSsupported is very limited, for example, the number of TBS supported isless than or equal to 8, the TBS index may directly indicate the TBS,and the MCS may be determined according to the TBS index and the Nru, sothe minimum signaling overhead may be ensured.

Third Embodiment

The UE receives the DCI sent by the base station, and determines,according to the joint coding field of the MCS and the predefinedtransmission information in the DCI and the number of RUs occupied byone TB, at least one of the following: the TBS, the Nrep, or the RV.

Herein, the operation that the UE determines at least one of the TBS,the Nrep, or the RV according to the joint coding field of the MCS andthe predefined transmission information in the DCI and the number of RUsoccupied by one TB includes that:

the UE determines the number of RUs occupied by one TB according to theresource allocation field; and the UE determines, according to the jointcoding field of the MCS and the predefined transmission information inthe DCI and the number of RUs occupied by one TB, at least one of thefollowing: the MCS, the Nrep, or the RV.

Herein, the number of RUs occupied by one TB is the number of RUsoccupied by one TB during an HARQ transmission, or the number of RUsoccupied by one TB before repetition processing of an HARQ transmission.

The operation that the UE determines at least one of the MCS, the Nrepor the RV according to the joint coding field of the MCS and thepredefined transmission information and the number of RUs occupied byone TB includes that:

the UE searches for at least one of the MCS, the Nrep, or the RV in aone-dimensional table according to the joint coding field of the MCS andthe predefined transmission information; and

the UE searches for the TBS in the two-dimensional table according tothe number of RUs occupied by one TB and the joint coding field of theMCS and the predefined transmission information.

Fourth Embodiment

The UE receives the DCI sent by the base station, and determines,according to the joint coding field of the TBS information and thepredefined transmission information and the resource allocation field,at least one of the following: the MCS, the Nrep, or the RV.

Herein, the operation that the UE determines at least one of the MCS,the Nrep, or the RV according to the joint coding field of the TBSinformation and the predefined transmission information and the resourceallocation field includes that:

the UE determines the number of RUs occupied by one TB according to theresource allocation field; and the UE determines, according to the jointcoding field of the TBS information and the predefined transmissioninformation and the number of RUs occupied by one TB, at least one ofthe following: the MCS, the Nrep, or the RV.

Herein, the number of RUs occupied by one TB is the number of RUsoccupied by one TB during an HARQ transmission, or the number of RUsoccupied by one TB before repetition processing of an HARQ transmission.

Herein, the operation that the UE determines at least one of the MCS,the Nrep or the RV according to the joint coding field of the TBSinformation and the predefined transmission information and the numberof RUs occupied by one TB includes that:

the UE searches for at least one of the TBS, the Nrep, or the RV in theone-dimensional table according to the joint coding field of the TBSinformation and the predefined transmission information; and

the UE searches for MCS in the two-dimensional table according to thenumber of RUs occupied by one TB and the joint coding field.

Fifth Embodiment

The UE receives the DCI sent by the base station, and determines thecoding modulation parameter according to the field for determining thecoding modulation parameter in the DCI.

Herein, the RU includes one of the following characteristics:

1) the number of resource elements included in one RU (Nre0=Nsc×Nsym0)and/or the number of time-domain symbols occupied by one RU (Nsym0)are/is the same in both modes for the UE, such as, the single-tonemultiple access mode and the multi-tone multiple access mode, and atleast one of the Nre0 or Nsym0 is a fixed value or determined accordingto the semi-static high-level configuration parameter;

2) the Nre0=Nsc×Nsym0 and the Nsym0 are different in both modes for theUE, such as, the single-tone multiple access mode and the multi-tonemultiple access mode.

Further, the RU includes one of the following characteristics:

the Nre0 or the Nsym0 in each multiple address mode is a fixed value ordetermined according to the semi-static high-level configurationparameter;

the Nre0 or the Nsym0 corresponding to the single-tone multiple addressmode is read from the first set, and the value of the Nre0 or the Nsym0corresponding to the multiple-tone multiple address mode is read fromthe second set; here, the first set is a subset of the second set;

the Nre0 or the Nsym0 corresponding to the single-tone multiple addressmode is an integral multiple of the Nre0 or the Nsym0 corresponding tothe multiple-tone multiple address mode;

the Nre0 or the Nsym0 corresponding to the multi-tone multiple addressmode is an integral multiple of the Nre0 or the Nsym0 corresponding tothe single-tone multiple address mode;

the Nre0 or the Nsym0 in each of the single-tone multiple address modeand the multi-tone multiple address mode is a common divisor of X, wherethe X is a positive integer greater than 10.

Further, the Nre0, or the Nsym0, or the Nre0 and the Nsym0, in bothmodes for the UE, such as, the single-tone multiple access mode and themulti-tone multiple access mode, is the same.

The RU includes one of the following characteristics:

1) Each RU is a time-frequency resource block including Nscfrequency-domain subcarriers and Nsym0 time-domain symbols; where theNsym0 is the number of time-domain symbols, which is a fixed value ordetermined according to the semi-static high-level configurationparameter; the Nsc is an integer greater than or equal to 1.

2) Each RU is a time-frequency resource block including Nscfrequency-domain subcarriers and

$\frac{{Nre}\; 0}{Nsc}$

time-domain symbols; where the Nre0 is the number of resource elements,which is a fixed value or determined according to the semi-statichigh-level configuration parameter.

In the above embodiments, there is such a situation: the UE is requiredto determine the coding modulation parameter according to the number ofRUs (Nru) occupied by one TB.

The UE determines the Nru according to the resource allocation field.

Situation 1

The UE determines, according to the resource allocation field, thenumber of frequency-domain subcarriers (Nsc) occupied by one TB and thenumber of time-domain OFDM symbols (Nsym) occupied by one TB, anddetermines the number of RUs (Nru) occupied by one TB according to theNsc and the Nsym.

Further, the Nsym has one of the following characteristics:

the fixed value of the Nsym in the single-tone multiple address mode andthe multi-tone multiple address mode is the same;

the fixed value of the Nsym in the single-tone multiple address mode isdifferent from that in the multi-tone multiple address mode;

the fixed value of the Nsym in the single-tone multiple address mode orthe multi-tone multiple address mode is different varies with a coveragelevel;

the Nsym in the single-tone multiple access mode is read from a firstset, and the Nsym in the multi-tone multiple access mode is read from asecond set; where the first set is a subset of the second set; and

the Nsym in the low coverage level is read from a first set, and theNsym in the high coverage level is read from a second set; where thefirst set is a subset of the second set.

Further, the Nsc is the power of 2 or the product of the prime numberless than 10 and the power of 2; the Nsym includes: the product of theprime number less than 10 and the power of 2, or the power of 2.

Specifically, the possible values of the Nsc is a subset of the set {1,2, 3, 4, 6, 8, 12}. The possible values of the Nsc is a subset of theset {1, 2, 3, 4, 6, 12}. The Nsym is equal to K1×144 for both thesingle-tone multiple address mode and the multi-tone multiple addressmode, where the K1 is an integer greater than or equal to 1. Or, thepossible values of the Nsc form a subset of the set {1, 2, 3, 4, 6, 8,12}, and the subset must include 8. The Nsym is equal to K2×144 for thesingle-tone multiple address mode, and the Nsym is equal to K3×288 forthe multi-tone multiple address mode, where the K2 and the K3 areintegers greater than or equal to 1. Here, the K1 is equal to 1, the K2is equal to 1, and the K3 is equal to 1; or, the K1 is equal to 5, theK2 is equal to 5, and the K3 is equal to 5; or, the K1 is equal to 10,the K2 is equal to 10, and the K3 is equal to 10.

Further, the Nsc is the power of 2 or the product of the prime numberless than 10 and the power of 2; each of the Nsym and the Nrep includesone of the following: the power of 2 or the product of the prime numberless than 10 and the power of 2, and only the power of 2.

Further, all of the values of the Nru satisfy one of the following: thepower of 2 or the product of the prime number less than 10 and the powerof 2, only the power of 2, and the natural number from 1 to Nmax, wherethe Nmax is an integer greater than or equal to 1.

Situation 2

That the UE determines the number of RUs (Nru) occupied by one TBaccording to the resource allocation field includes that:

the UE determines, according to the resource allocation field, thenumber of frequency-domain subcarriers Nsc occupied by one TB, thenumber of time-domain OFDM symbols (Nsym) occupied by one TB, and theNrep; and the UE determines the number of RUs (Nru) occupied by one TBaccording to the number of frequency-domain subcarriers Nsc occupied byone TB, the number of time-domain OFDM symbols (Nsym) occupied by oneTB, and the Nrep.

Herein, each RU includes Nsc consecutive frequency-domain subcarriersand Nsym0 consecutive time-domain OFDM symbols; each RU includesNsc×Nsym0 resource elements. Here, the Nsym0 is a preset fixed value.

Further, that the UE determines the number of OFDM symbols (Nsym)occupied by one TB or at least one of the Nre0 or the Nsym0 according toat least one of the following:

search space, DCI format, CRC scrambling mode corresponding to the DCI,coverage mode, information about Nrep in a high-level configurationsignaling, information about Nrep in a broadcast message, and multipleaccess mode.

As illustrated in FIG. 2, the disclosure also provides a User Equipment(UE), which includes that:

a receiving module, configured to receive Downlink Control Information(DCI) from a base station; and

a determining module, configured to determine a coding modulationparameter according to a field for determining the coding modulationparameter, in the DCI.

Herein, the determining module may be further configured to determinethe coding modulation parameter using one of the following manners.

Manner 1:

determining that the field for determining the coding modulationparameter comprises a resource allocation field and a Modulation andCoding Scheme (MCS) field;

determining a number of Resource Units (RUs) occupied by a TransmissionBlock (TB) according to the resource allocation field; and

determining, by the UE, according to the MCS field, or the number of RUsoccupied by the TB, or the MCS field and the number of RUs occupied bythe TB, at least one of the following: Transmission Block Size (TBS), anumber of repetitions (Nrep), or a Redundancy Version (RV).

Manner 2:

determining that the field for determining the coding modulationparameter comprises a resource allocation field and a TBS indicationfield;

determining a number of RUs occupied by a TB according to the resourceallocation field; and

determining, according to the TBS indication field, or the number of RUsoccupied by the TB, or the TBS indication field and the number of RUsoccupied by the TB, at least one of the following: an MCS, an Nrep, oran RV.

Manner 3:

determining that the field for determining the coding modulationparameter comprises a resource allocation field and a joint coding fieldof an MCS and predefined transmission information;

wherein the joint coding field of the MCS and the predefinedtransmission information at least comprises that:

the predefined transmission information comprises an RV; RVscorresponding to N1 MCSs are always equal to 0; RVs corresponding to N2MCSs have at least two values; and a number of all the MCSs in an MCSfield is (N1+N2); or,

the predefined transmission information comprises an Nrep; the smallerthe MCS index, the larger the Nrep corresponding to the MCS index; thelarger the MCS index, the smaller the Nrep corresponding to the MCSindex; or

the predefined transmission information comprises the RV and the Nrep;the smaller the MCS index, the larger the Nrep corresponding to the MCSindex and the smaller a number of RVs corresponding to the MCS index;the larger the MCS index, the smaller the Nrep corresponding to the MCSindex and the larger the number of RVs corresponding to the MCS index;

determining a number of RUs occupied by a TB according to the resourceallocation field; and

determining, according to the joint coding field of the MCS and thepredefined transmission information, or the number of RUs occupied bythe TB, or the joint coding field of the MCS and the predefinedtransmission information and the number of RUs occupied by the TB, atleast one of the following: a TBS, the Nrep, or the RV.

Manner 4:

determining that the field for determining the coding modulationparameter comprises a resource allocation field and a joint coding fieldof TBS information and predefined transmission information;

wherein the joint coding field of the TBS information and the predefinedtransmission information at least comprises that:

the predefined transmission information comprises an RV, RVscorresponding to N1 TBSs in the TBS indication field are always equal to0; RVs corresponding to N2 TBSs in the TBS indication field at leasthave two values; and a number of all the TBSs in the TBS indicationfield is (N1+N2); or,

the predefined transmission information comprises an Nrep; the smallerthe TBS, the larger the Nrep corresponding to the TBS; the larger theTBS, the smaller the Nrep corresponding to the TBS; or

the predefined transmission information comprises an RV and an Nrep; thesmaller the TBS, the larger the Nrep corresponding to the TBS and thesmaller the number of RVs corresponding to the TBS; the larger the TBS,the smaller the Nrep corresponding to the TBS and the larger the numberof RVs corresponding to the TBS;

determining a number of RUs occupied by a TB according to the resourceallocation field; and

determining, according to the joint coding field of the TBS indicationfield and the predefined transmission information, or the number of RUsoccupied by the TB, or the joint coding field of the TBS indicationfield and the predefined transmission information and the number of RUsoccupied by the TB, at least one of the following: the TBS, the Nrep, orthe RV;

wherein the number of RUs occupied by the TB is a number of RUs occupiedby the TB during a Hybrid Automatic Repeat request (HARQ) transmission,or the number of RUs occupied by the TB is a number of RUs occupied bythe TB before repetition processing of an HARQ transmission.

Herein, the determining module may be further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

determine an TBS index and at least one of an Nrep or an RV according toan MCS field; and

determine a TBS according to the TBS index and the number of RUsoccupied by the TB.

Herein, the determining module is further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

search for a TBS index and at least one of an Nrep or an RVcorresponding to an MCS field in a first preset mapping relationshipamong an MCS index, a TBS index and at least one of the Nrep or the RV;and determine a TBS according to the TBS index and the number of RUsoccupied by the TB.

Herein, the determining module may be further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

determine at least one of the following according to an MCS field: a TBSindex, an Nrep, or an RV; and search for a TBS corresponding to the TBSindex and the number of RUs in a second preset mapping relationshipamong the TBS index, the number of RUs and the TBS.

Herein, the determining module is further configured to:

determine a number of RUs occupied by a TB according to a resourceallocation field;

determine a joint coding information of a TBS index and predefinedtransmission information according to an MCS field; determine accordingto the joint coding information of the TBS index and the predefinedtransmission information at least one of the following: the TBS index,an Nrep, or an RV; and determine a TBS according to the TBS index andthe number of RUs occupied by the TB.

Herein, the determining module is further configured to:

determine a number of resource elements occupied by a TB or a number oftime-domain symbols or a number of time-domain OFDM symbols according toat least one of the following: search space, DCI format, CyclicRedundancy Check (CRC) scrambling mode corresponding to the DCI,coverage mode, information about the Nrep in high-level configurationsignaling, information about the Nrep in a broadcast message, ormultiple access mode; and

determine the number of RUs according to the number of resource elementsor the number of time-domain symbols or the number of time-domain OFDMsymbols.

The disclosure also provides a base station, which includes that:

a sending module, configured to send Downlink Control Information (DCI)to a User Equipment (UE), where the DCI comprises a field fordetermining a coding modulation parameter.

As illustrated in FIG. 3, the disclosure also provides a system fordetermining a coding modulation parameter, which includes:

a base station according to any one of the embodiments above, and a UserEquipment (UE) according to any one of the embodiments above.

Apparently, those skilled in the art should appreciate that the abovemodules and steps of the disclosure can be implemented by ageneral-purpose computing device, and they can be centralized in asingle computing device or distributed on a network composed of multiplecomputing devices; alternatively, they can be implemented by a programcode which is capable of being executed by the computing device, so thatthey can be stored in a storage device and executed by the computingdevice; and in some situations, the presented or described steps can beexecuted in an order different from that described here; or they aremade into integrated circuit modules, respectively; or multiple modulesand steps of them are made into a single integrated circuit module torealize. In this way, the disclosure is not limited to any particularcombination of hardware and software.

The above is only the preferred embodiment of the disclosure and notintended to limit the disclosure; for those skilled in the art, thedisclosure may have various modifications and changes. Anymodifications, equivalent replacements, improvements and the like withinthe principle of the disclosure shall fall within the scope of theclaims of the disclosure.

INDUSTRIAL APPLICABILITY

The disclosure provides a method, device and system for determining acoding modulation parameter. The method includes that: the UE receivesthe DCI from the base station, and determines the coding modulationparameter according to the field for determining the coding modulationparameter in the DCI. Through the technical solutions of the presentdisclosure, the coding modulation parameter is determined according tothe field for determining the coding modulation parameter in the DCI, sothat the determination of the coding modulation parameter of the NB-IOTsystem is implemented.

1. A method for determining a coding modulation parameter, comprising:receiving, by a User Equipment (UE), Downlink Control Information (DCI)from a base station; and determining, by the UE, a coding modulationparameter, according to a field for determining the coding modulationparameter, in the DCI; wherein the coding modulation parameter comprisesat least one of the following: Transmission Block Size (TBS), aModulation and Coding Scheme (MCS), or predefined transmissioninformation; wherein the field for determining the coding modulationparameter comprises: a resource allocation field and one of an MCSfield, or a joint coding field of the MCS and the predefinedtransmission information; wherein the resource allocation field is usedfor providing information about Resource Unit (RU)-based resourceallocation for a Transmission Block (TB); the MCS field is used forindicating the MCS; and wherein an RU comprises two-dimensionaltime-frequency resources comprising Nsc consecutive frequency-domainsubcarriers and Nsym consecutive time-domain Orthogonal FrequencyDivision Multiplexing (OFDM) symbols; the RU comprises Nsc×Nsym resourceelements, where the Nsc and the Nsym are integers greater than or equalto 1; wherein the predefined transmission information comprises at leastone of the following: a number of repetitions (Nrep) or a RedundancyVersion (RV), wherein the RV is an element in a set {0, 1} or a set {0,1, 2, 3}; wherein determining the coding modulation parameter accordingto the field for determining the coding modulation parameter, in the DCIcomprises one of the following: Manner 1: determining, by the UE, thatthe field for determining the coding modulation parameter comprises theresource allocation field and the MCS field; determining, by the UE,according to the resource allocation field, a number of RUs occupied bythe TB; and determining the Nrep by the UE according to the MCS field,or the number of RUs occupied by the TB, or the MCS field and the numberof RUs occupied by the TB; Manner 2: determining, by the UE, that thefield for determining the coding modulation parameter comprises theresource allocation field and the joint coding field of the MCS and thepredefined transmission information; wherein the joint coding field ofthe MCS and the predefined transmission information at least comprisesthat: the predefined transmission information comprises the RV; RVscorresponding to N1 MCSs are always equal to 0; RVs corresponding to N2MCSs have at least two values; and a number of all the MCSs in the MCSfield is (N1+N2); or, the predefined transmission information comprisesthe Nrep; the smaller the MCS index, the larger the Nrep correspondingto the MCS index; the larger the MCS index, the smaller the Nrepcorresponding to the MCS index; or the predefined transmissioninformation comprises the RV and the Nrep; the smaller the MCS index,the larger the Nrep corresponding to the MCS index and the smaller thenumber of RVs corresponding to the MCS index; the larger the MCS index,the smaller the Nrep corresponding to the MCS index and the larger thenumber of RVs corresponding to the MCS index; determining, by the UE,according to the resource allocation field, a number of RUs occupied bythe TB; and determining, by the UE, according to the joint coding fieldof the MCS and the predefined transmission information, or the number ofRUs occupied by the TB, or the joint coding field of the MCS and thepredefined transmission information and the number of RUs occupied bythe TB, at least one of the following: the TBS, the Nrep, or the RV;wherein the number of RUs occupied by the TB is a number of RUs occupiedby the TB during a Hybrid Automatic Repeat request (HARQ) transmission,or the number of RUs occupied by the TB is a number of RUs occupied bythe TB before repetition processing of an HARQ transmission.
 2. Themethod according to claim 1, wherein the RU comprises one of thefollowing characteristics: for the UE, the numbers of resource elementscomprised in one RU, the numbers of time-domain symbols occupied by oneRU, or the numbers of resource elements comprised in one RU and thenumbers of time-domain symbols occupied by the one RU are the same inboth of a single-tone multiple access mode and a multi-tone multipleaccess mode, and at least one of the number of resource elements or thenumber of time-domain symbols is a fixed value or determined accordingto a semi-static high-level configuration parameter; or for the UE, thenumbers of resource elements comprised in the RU and the numbers oftime-domain symbols occupied by the RU are different in both of thesingle-tone multiple access mode and the multi-tone multiple accessmode; and wherein the number of resource elements and the number oftime-domain symbols in each of the single-tone multiple access mode andthe multi-tone multiple access mode are fixed values or determinedaccording to the semi-static high-level configuration parameter; or thenumber of resource elements or the number of time-domain symbols in thesingle-tone multiple access mode is read from a first set, and thenumber of resource elements or the number of time-domain symbols in themulti-tone multiple access mode is read from a second set; where thefirst set is a subset of the second set; or the number of resourceelements in the single-tone multiple access mode is an integral multipleof the number of resource elements in the multi-tone multiple accessmode, or the number of time-domain symbols in the single-tone multipleaccess mode is an integral multiple of the number of time-domain symbolsin the multi-tone multiple access mode; or the number of resourceelements in the multi-tone multiple access mode is an integral multipleof the number of resource elements in the single-tone multiple accessmode, or the number of time-domain symbols in the multi-tone multipleaccess mode is an integral multiple of the number of time-domain symbolsin the single-tone multiple access mode; or the number of resourceelements or the number of time-domain symbols in each of the single-tonemultiple access mode and the multi-tone multiple access mode is a commondivisor of X, where the X is a positive integer greater than a presetthreshold.
 3. The method according to claim 2, wherein the RU is atime-frequency resource block comprising Nsc frequency-domainsubcarriers and Nsym0 time-domain symbols; where the Nsym0 is the numberof time-domain symbols, which is a fixed value or determined accordingto the semi-static high-level configuration parameter; the Nsc is aninteger greater than or equal to 1; or the RU is a time-frequencyresource block comprising Nsc frequency-domain subcarriers and$\frac{{Nre}\; 0}{Nsc}$ time-domain symbols; where the Nre0 is thenumber of resource elements, which is a fixed value or determinedaccording to the semi-static high-level configuration parameter.
 4. Themethod according to claim 3, wherein the Nsc is an element in a subsetof a set {1, 2, 3, 4, 6, 8, 12}.
 5. The method according to claim 1,wherein the number of RUs comprises the product of a prime number lessthan 10 and a power of
 2. 6. A method for determining a codingmodulation parameter, comprising: sending, by a base station, DownlinkControl Information (DCI) to a User Equipment (UE), wherein the DCIcomprises a field for determining a coding modulation parameter; whereinthe coding modulation parameter comprises at least one of the following:Transmission Block Size (TBS), a Modulation and Coding Scheme (MCS), orpredefined transmission information; wherein the field for determiningthe coding modulation parameter comprises: a resource allocation fieldand one of an MCS field, or a joint coding field of the MCS and thepredefined transmission information; wherein the resource allocationfield is used for providing information about Resource Unit (RU)-basedresource allocation for a Transmission Block (TB); the MCS field is usedfor indicating the MCS; and wherein an RU comprises two-dimensionaltime-frequency resources comprising Nsc consecutive frequency-domainsubcarriers and Nsym consecutive time-domain Orthogonal FrequencyDivision Multiplexing (OFDM) symbols; the RU comprises Nsc×Nsym resourceelements, where the Nsc and the Nsym are integers greater than or equalto 1; wherein the predefined transmission information comprises at leastone of the following: a number of repetitions (Nrep) or a RedundancyVersion (RV), wherein the RV is an element in a set {0, 1} or a set {0,1, 2, 3}; wherein the method further comprises determining, by the UE,the coding modulation parameter according to the field for determiningthe coding modulation parameter, wherein the determining, by the UE, thecoding modulation parameter according to the field for determining thecoding modulation parameter comprises one of the following: Manner 1:determining, by the UE, that the field for determining the codingmodulation parameter comprises the resource allocation field and the MCSfield; determining, by the UE, according to the resource allocationfield, a number of RUs occupied by the TB; and determining the Nrep bythe UE according to the MCS field, or the number of RUs occupied by theTB, or the MCS field and the number of RUs occupied by the TB; Manner 2:determining, by the UE, that the field for determining the codingmodulation parameter comprises the resource allocation field and thejoint coding field of the MCS and the predefined transmissioninformation; wherein the joint coding field of the MCS and thepredefined transmission information at least comprises that: thepredefined transmission information comprises the RV; RVs correspondingto N1 MCSs are always equal to 0; RVs corresponding to N2 MCSs have atleast two values; and a number of all the MCSs in the MCS field is(N1+N2); or, the predefined transmission information comprises the Nrep;the smaller the MCS index, the larger the Nrep corresponding to the MCSindex; the larger the MCS index, the smaller the Nrep corresponding tothe MCS index; or the predefined transmission information comprises theRV and the Nrep; the smaller the MCS index, the larger the Nrepcorresponding to the MCS index and the smaller the number of RVscorresponding to the MCS index; the larger the MCS index, the smallerthe Nrep corresponding to the MCS index and the larger the number of RVscorresponding to the MCS index; determining, by the UE, according to theresource allocation field, a number of RUs occupied by the TB; anddetermining, by the UE, according to the joint coding field of the MCSand the predefined transmission information, or the number of RUsoccupied by the TB, or the joint coding field of the MCS and thepredefined transmission information and the number of RUs occupied bythe TB, at least one of the following: the TBS, the Nrep, or the RV;wherein the number of RUs occupied by the TB is a number of RUs occupiedby the TB during a Hybrid Automatic Repeat request (HARQ) transmission,or the number of RUs occupied by the TB is a number of RUs occupied bythe TB before repetition processing of an HARQ transmission.
 7. Themethod according to claim 6, wherein the RU comprises one of thefollowing characteristics: for the UE, the numbers of resource elementscomprised in one RU, the numbers of time-domain symbols occupied by oneRU, or the numbers of resource elements comprised in one RU and thenumbers of time-domain symbols occupied by the one RU are the same inboth of a single-tone multiple access mode and a multi-tone multipleaccess mode, and at least one of the number of resource elements or thenumber of time-domain symbols is a fixed value or determined accordingto a semi-static high-level configuration parameter; or for the UE, thenumbers of resource elements comprised in the RU and the numbers oftime-domain symbols occupied by the RU are different in both of thesingle-tone multiple access mode and the multi-tone multiple accessmode; and wherein the number of resource elements and the number oftime-domain symbols in each of the single-tone multiple access mode andthe multi-tone multiple access mode are fixed values or determinedaccording to the semi-static high-level configuration parameter; or thenumber of resource elements or the number of time-domain symbols in thesingle-tone multiple access mode is read from a first set, and thenumber of resource elements or the number of time-domain symbols in themulti-tone multiple access mode is read from a second set; where thefirst set is a subset of the second set; or the number of resourceelements in the single-tone multiple access mode is an integral multipleof the number of resource elements in the multi-tone multiple accessmode, or the number of time-domain symbols in the single-tone multipleaccess mode is an integral multiple of the number of time-domain symbolsin the multi-tone multiple access mode; or the number of resourceelements in the multi-tone multiple access mode is an integral multipleof the number of resource elements in the single-tone multiple accessmode, or the number of time-domain symbols in the multi-tone multipleaccess mode is an integral multiple of the number of time-domain symbolsin the single-tone multiple access mode; or the number of resourceelements or the number of time-domain symbols in each of the single-tonemultiple access mode and the multi-tone multiple access mode is a commondivisor of X, where the X is a positive integer greater than a presetthreshold.
 8. The method according to claim 7, wherein the RU is atime-frequency resource block comprising Nsc frequency-domainsubcarriers and Nsym0 time-domain symbols; where the Nsym0 is the numberof time-domain symbols, which is a fixed value or determined accordingto the semi-static high-level configuration parameter; the Nsc is aninteger greater than or equal to 1; or the RU is a time-frequencyresource block comprising Nsc frequency-domain subcarriers and$\frac{{Nre}\; 0}{Nsc}$ time-domain symbols; where the Nre0 is thenumber of resource elements, which is a fixed value or determinedaccording to the semi-static high-level configuration parameter.
 9. Themethod according to claim 8, wherein the Nsc is an element in a subsetof a set {1, 2, 3, 4, 6, 8, 12}.
 10. The method according to claim 6,wherein the number of RUs comprises the product of a prime number lessthan 10 and a power of
 2. 11. A User Equipment (UE), comprising aprocessor and a memory storing instructions, wherein when theinstructions in the memory are run, the processor is configured to:receive Downlink Control Information (DCI) from a base station; anddetermine a coding modulation parameter according to a field fordetermining the coding modulation parameter, in the DCI; wherein thecoding modulation parameter comprises at least one of the following:Transmission Block Size (TBS), a Modulation and Coding Scheme (MCS), orpredefined transmission information; wherein the field for determiningthe coding modulation parameter comprises: a resource allocation fieldand one of an MCS field, or a joint coding field of the MCS and thepredefined transmission information; wherein the resource allocationfield is used for providing information about Resource Unit (RU)-basedresource allocation for a Transmission Block (TB); the MCS field is usedfor indicating the MCS; and wherein an RU comprises two-dimensionaltime-frequency resources comprising Nsc consecutive frequency-domainsubcarriers and Nsym consecutive time-domain Orthogonal FrequencyDivision Multiplexing (OFDM) symbols; the RU comprises Nsc×Nsym resourceelements, where the Nsc and the Nsym are integers greater than or equalto 1; wherein the predefined transmission information comprises at leastone of the following: a number of repetitions (Nrep) or a RedundancyVersion (RV), wherein the RV is an element in a set {0, 1} or a set {0,1, 2, 3}; the processor is further configured to determine the codingmodulation parameter according to the field for determining the codingmodulation parameter, in the DCI, in one of the following manners:Manner 1: determining that the field for determining the codingmodulation parameter comprises the resource allocation field and the MCSfield; determining, according to the resource allocation field, a numberof RUs occupied by the TB; and determining the Nrep according to the MCSfield, or the number of RUs occupied by the TB, or the MCS field and thenumber of RUs occupied by the TB; Manner 2: determining that the fieldfor determining the coding modulation parameter comprises the resourceallocation field and the joint coding field of the MCS and thepredefined transmission information; wherein the joint coding field ofthe MCS and the predefined transmission information at least comprisesthat: the predefined transmission information comprises the RV; RVscorresponding to N1 MCSs are always equal to 0; RVs corresponding to N2MCSs have at least two values; and a number of all the MCSs in the MCSfield is (N1+N2); or, the predefined transmission information comprisesthe Nrep; the smaller the MCS index, the larger the Nrep correspondingto the MCS index; the larger the MCS index, the smaller the Nrepcorresponding to the MCS index; or the predefined transmissioninformation comprises the RV and the Nrep; the smaller the MCS index,the larger the Nrep corresponding to the MCS index and the smaller thenumber of RVs corresponding to the MCS index; the larger the MCS index,the smaller the Nrep corresponding to the MCS index and the larger thenumber of RVs corresponding to the MCS index; determining, according tothe resource allocation field, a number of RUs occupied by the TB; anddetermining, according to the joint coding field of the MCS and thepredefined transmission information, or the number of RUs occupied bythe TB, or the joint coding field of the MCS and the predefinedtransmission information and the number of RUs occupied by the TB, atleast one of the following: the TBS, the Nrep, or the RV; wherein thenumber of RUs occupied by the TB is a number of RUs occupied by the TBduring a Hybrid Automatic Repeat request (HARQ) transmission, or thenumber of RUs occupied by the TB is a number of RUs occupied by the TBbefore repetition processing of an HARQ transmission.
 12. The UEaccording to claim 11, wherein the RU comprises one of the followingcharacteristics: for the UE, the numbers of resource elements comprisedin one RU, the numbers of time-domain symbols occupied by one RU, or thenumbers of resource elements comprised in one RU and the numbers oftime-domain symbols occupied by the one RU are the same in both of asingle-tone multiple access mode and a multi-tone multiple access mode,and at least one of the number of resource elements or the number oftime-domain symbols is a fixed value or determined according to asemi-static high-level configuration parameter; or for the UE, thenumbers of resource elements comprised in the RU and the numbers oftime-domain symbols occupied by the RU are different in both of thesingle-tone multiple access mode and the multi-tone multiple accessmode; and wherein the number of resource elements and the number oftime-domain symbols in each of the single-tone multiple access mode andthe multi-tone multiple access mode are fixed values or determinedaccording to the semi-static high-level configuration parameter; or thenumber of resource elements or the number of time-domain symbols in thesingle-tone multiple access mode is read from a first set, and thenumber of resource elements or the number of time-domain symbols in themulti-tone multiple access mode is read from a second set; where thefirst set is a subset of the second set; or the number of resourceelements in the single-tone multiple access mode is an integral multipleof the number of resource elements in the multi-tone multiple accessmode, or the number of time-domain symbols in the single-tone multipleaccess mode is an integral multiple of the number of time-domain symbolsin the multi-tone multiple access mode; or the number of resourceelements in the multi-tone multiple access mode is an integral multipleof the number of resource elements in the single-tone multiple accessmode, or the number of time-domain symbols in the multi-tone multipleaccess mode is an integral multiple of the number of time-domain symbolsin the single-tone multiple access mode; or the number of resourceelements or the number of time-domain symbols in each of the single-tonemultiple access mode and the multi-tone multiple access mode is a commondivisor of X, where the X is a positive integer greater than a presetthreshold.
 13. The UE according to claim 12, wherein the RU is atime-frequency resource block comprising Nsc frequency-domainsubcarriers and Nsym0 time-domain symbols; where the Nsym0 is the numberof time-domain symbols, which is a fixed value or determined accordingto the semi-static high-level configuration parameter; the Nsc is aninteger greater than or equal to 1; or the RU is a time-frequencyresource block comprising Nsc frequency-domain subcarriers and$\frac{{Nre}\; 0}{Nsc}$ time-domain symbols; where the Nre0 is thenumber of resource elements, which is a fixed value or determinedaccording to the semi-static high-level configuration parameter.
 14. TheUE according to claim 13, wherein the Nsc is an element in a subset of aset {1, 2, 3, 4, 6, 8, 12}.
 15. The UE according to claim 11, whereinthe number of RUs comprises the product of a prime number less than 10and a power of
 2. 16. A non-transitory storage medium, in whichinstructions are stored; the instructions are used for performing amethod for determining a coding modulation parameter according toclaim
 1. 17. The storage medium according to claim 16, wherein the RUcomprises one of the following characteristics: for the UE, the numbersof resource elements comprised in one RU, the numbers of time-domainsymbols occupied by one RU, or the numbers of resource elementscomprised in one RU and the numbers of time-domain symbols occupied bythe one RU are the same in both of a single-tone multiple access modeand a multi-tone multiple access mode, and at least one of the number ofresource elements or the number of time-domain symbols is a fixed valueor determined according to a semi-static high-level configurationparameter; or for the UE, the numbers of resource elements comprised inthe RU and the numbers of time-domain symbols occupied by the RU aredifferent in both of the single-tone multiple access mode and themulti-tone multiple access mode; and wherein the number of resourceelements and the number of time-domain symbols in each of thesingle-tone multiple access mode and the multi-tone multiple access modeare fixed values or determined according to the semi-static high-levelconfiguration parameter; or the number of resource elements or thenumber of time-domain symbols in the single-tone multiple access mode isread from a first set, and the number of resource elements or the numberof time-domain symbols in the multi-tone multiple access mode is readfrom a second set; where the first set is a subset of the second set; orthe number of resource elements in the single-tone multiple access modeis an integral multiple of the number of resource elements in themulti-tone multiple access mode, or the number of time-domain symbols inthe single-tone multiple access mode is an integral multiple of thenumber of time-domain symbols in the multi-tone multiple access mode; orthe number of resource elements in the multi-tone multiple access modeis an integral multiple of the number of resource elements in thesingle-tone multiple access mode, or the number of time-domain symbolsin the multi-tone multiple access mode is an integral multiple of thenumber of time-domain symbols in the single-tone multiple access mode;or the number of resource elements or the number of time-domain symbolsin each of the single-tone multiple access mode and the multi-tonemultiple access mode is a common divisor of X, where the X is a positiveinteger greater than a preset threshold.
 18. The storage mediumaccording to claim 17, wherein the RU is a time-frequency resource blockcomprising Nsc frequency-domain subcarriers and Nsym0 time-domainsymbols; where the Nsym0 is the number of time-domain symbols, which isa fixed value or determined according to the semi-static high-levelconfiguration parameter; the Nsc is an integer greater than or equal to1; or the RU is a time-frequency resource block comprising Nscfrequency-domain subcarriers and $\frac{{Nre}\; 0}{Nsc}$ time-domainsymbols; where the Nre0 is the number of resource elements, which is afixed value or determined according to the semi-static high-levelconfiguration parameter.
 19. The storage medium according to claim 18,wherein the Nsc is an element in a subset of a set {1, 2, 3, 4, 6, 8,12}.
 20. The storage medium according to claim 16, wherein the number ofRUs comprises the product of a prime number less than 10 and a power of2.